EP 1082636 A1 20010314 - CONTACT LENSES WITH CONTOURED EDGES
Title (en)
CONTACT LENSES WITH CONTOURED EDGES
Title (de)
KONTAKTLINSE MIT PROFILIERTEN RÄNDERN
Title (fr)
LENTILLES DE CONTACT AUX BORDS PROFILES
Publication
Application
Priority
- US 0004635 W 20000224
- US 27586699 A 19990325
Abstract (en)
[origin: WO0058773A1] The invention provides contact lenses with contoured lens edges. The contoured lens edges of the invention form a substantially smooth curve (21). The lens edge comprises the area beginning at the periphery (18) of the optic zone (11) and ending at the outermost point (19) of the lens. The use of the contoured lens edge eliminates the need for one or more of a lenticular zone, bevel, side wall, or other zones found in a conventional contact lens to facilitate lens handling and comfort. The invention provides also a method for designing a contact lens comprising, consisting essentially of, and consisting of: a) designing an optic zone for a first lens surface; b) selecting an x and a y coordinate for each of at least two points on the first lens surface; and c) fitting a curve through the points specified in step b) to form a contoured lens edge, the contoured lens edge being a substantially smooth curve having a functional form selected from a group consisting of a polynomial, a ratio of two polynomials, a trigonometric function, a parametric function, a spline, a conic section, and combinations thereof.
IPC 1-7
IPC 8 full level
G02C 7/04 (2006.01); G02C 7/06 (2006.01); G02C 13/00 (2006.01)
CPC (source: EP KR US)
G02C 7/04 (2013.01 - EP KR US)
Citation (search report)
See references of WO 0058773A1
Designated contracting state (EPC)
DE FR GB IE IT
DOCDB simple family (publication)
WO 0058773 A1 20001005; AR 031065 A1 20030910; AU 3241800 A 20001016; BR 0005568 A 20010306; CA 2332330 A1 20001005; CA 2332330 C 20100727; CN 1297538 A 20010530; EP 1082636 A1 20010314; JP 2002540468 A 20021126; KR 100739485 B1 20070719; KR 20010043813 A 20010525; TW 487815 B 20020521; US 6206520 B1 20010327
DOCDB simple family (application)
US 0004635 W 20000224; AR P000101343 A 20000324; AU 3241800 A 20000224; BR 0005568 A 20000224; CA 2332330 A 20000224; CN 00800382 A 20000224; EP 00910304 A 20000224; JP 2000608214 A 20000224; KR 20007013245 A 20001124; TW 89105385 A 20000412; US 27586699 A 19990325